Drill press feed



Oct. 20, 1931. w; w'. EDWARDS 1,527,937

DRILL PRESS FEED Filed NOV. 12,.1928 2 Sheets-Sheet l [Zn/en r 11/. ldEdwird .lztorney Opt. 20; 1931. w. w. EDWARDS 1,827,931

' DRILL' PRESS FEED Filed Nov. 12, 1928 2 Sheets-Sheet 2 Patented Oct. 20, 1931- I V y w'ILLIA Mw LTon EDWARDS; or os ANGELEs, cALIronnIA V mic-prams FEEVD' "a plica ion" fiiea' November 12 1928. VSerial No.31 8,65 0. I Q

My invention relates to a drilling machine of the type commonly known as radial drills, in which a drill is carried in a chuck adapted to rotate on afvertical axis, which chuckis' 5 mounted so-that it maybe swung horiz'ontaland partlcularly to-Figflfwhere ageneral assembly of my device is shown, 45 indicates ly in an arc to various positions"arounda standard and disposed at various positions radially of -the pivotal center (of the standard, and also be disposed'at' yarious 1eve1s-.- if i mounting in a drilling'machine of the above character which is so constructed as to permil; ready adjustmentof thedrill toivarious positions both horizontally and vertically", and by 1 hich thedrill mayibemaintained' in itsadjusted position; v 4 5 .1

Another object istoprovide ameans where by a drill carried on an. adjustablesup'port of the character described-may b'e driven continuo u'sly and beimanually? fed'to' or 'withdrawn from the work'reither by. means of a screw feed as in effecting slow; advanceor retracting of the. drill relativexto the work, or byfa lever-control'ledfeed inI'efi'ectingZ rapid advance or retraction 'of the drill relative to e'w'orkl V a 7 A further objectisito provide a machine of the above character in which; the 1, parts are of simple constructionand-adaptedto be readily assembled or dismantled,fand in which 1 the wearing parts may 5 be readily lubricated and be easily'removed andreplaced inevent of excessivejwear. v,: L

With the "foregoing objects-in'--,-vie.w together with suchother objects asmay subsequently appear,my invention resides, in the I partsand in the construction;combination and arrangement of parts hereinafter described and claimedand illustrated intheaccompa'nying'fdrawings', in whichi I Figfil is '3, fragmentary?perspective view showing my device in full I assembly on the .radiallbracket'of'yany ordinary; radial drill assembly.

v, Fig. 2 is: a fragmentary ball thrust bearing for holding ,the drill 1 r *member 60,-the,upper'and loweredges-ofthe Fig. 3 is a vlefiwmkn 5311563 3 of Fig. 4

An object of my inventionvis to provide a j Fig; 5 is a section taken on' 'line 5 -5 of Fig.4; 9 i" Fig. 6 is a section taken'on line*6;'6' of Fig/Ly Y Referring to th'e'drawings more specifically porting column (not shown),'the outer end of said guideway being supported by a diag- PATENT oFF cE onal strut-46, which strut is suitably connect- 7 ed to the column (not shown)'." Extending parallel with the'guide and on one side thereofithere provided a 'revoluble shaft 48 which is supported at the; outer end by bearing 50 and 'on the other end by a suitable bearingjon the column support (not shown 'Mounted upon'the'guideway 45 is a ca rriage designated in 'its'entirety by numeral 20. The carriage embodies a back wall portion Inoiinted to slide on the guideway 45 there "being a dove-tailslidingengagement between; the upper and lower edges of'the guideway 45 and-the back wall 60 of the carriage, as indica'ted at 61 and 62 in Fig. 4, and projecting upwardlyfromthe back wall 160, are vertical parallel members 63 1 and 64, having front facesa and 6 extending flush-with thefront face '0 ofthe back member 60.} "Mounted on thefronttof the' .backwall portion60 is a fhousingemboclying a pair of .side Walls-'' and 66-having inner end faces d and e which members 63 and-64 by screws 69 orbysuit-x abut againsttheface 0 of the back wall. The

"side walls65 and 66 terminate-on cme, sponding horizontal j plane above the back ,wall60. as indicated at-f in Fig. 3, there being I -.projection's v67'v and; 68 however extending from theIinnerupper edges of the side walls i 65: and 66lying over the upper portion ofthe 'members63 andfiet on thejback wall. aiIThe' members 67 and 68 arepsecured to the able fastenings; The side wall portions 65 and 66 are connected together adjacent their :lower ends by a transverse I wall .70',which abuts' against ther wall c on the back wall #wall portion 770 extendingfiush with thieluppelt and lower; edges of the -back wall 60, as

faces of the walls and are formed to re.-

' ceive a bearing 71 through which a vertical revoluble shaft 7 2 extends, as will be later described. The upper portion of the side walls 65 and 66 project beyond the lower portions thereof, and extending over the space between the upper portions ofthe side walls-'65 and 66 is a cover plate 7 3 which comprisesa vertical wall 7 1- which abuts against the outer vertical edges of the side walls 65 and66 and also em; bodies a horizontal wall whichseats on the upper edges of the side walls 65 and 66, as and 4. "The 99 and 100, as particularlyshown in Fig. 16'.

a which are. designed'to align with the channels 97 and 98 when the front and back members are fastened tog'ether'to form vertical guideways in which are slidably. mounted rack bars 101-and102, as particularly shown in Fig. 6. The upper ends of the rack bars are connected to a cross head 103 in which the upper endof the vertical shaft 72-.is'journaled; theshaft 72 being formed with areduced upper. end portion 104 which passes through the cross head 103 and is fittedwitha collar 105 which bears on the cross head; and supports the shaft 72. 7

An end. thrust bearing is interposed be tween a shoulder 107 and the under side of the cross: head .103, 'as distinctly shown in N Fig. 2. Arranged within the front portion of the carriagezare idler spur gearsIOS and 109 mounted on a shaft 110journaled in the walls .65 and 66, as shown in Fig. 6, which spur gears inesh with the rack bars-101 and 102 and also mesh i with spungears .111 and 112.52%(1 on a shaft 113' :journaled in' the walls 65 and 66. The shaft 113 -projects through the wall 66',- "and affixed to its end is a disk 114 formed with peripheral sockets 115 adapted to receivea demountable 'lever,not shown, by means of which the disk 114 may be" manually rotated to revolve" the shaft 113 and effect longitudinalmovement of the rack bars 101 and 102to move'the shaft 72 longitudinally relative to the can riag'c'toadvance or retract a drill 116 carried in a chuck 117 on the'shaft 7 2 relative'tothe work whichjmay' be supported on the base (not shown). By this means, rapid vertical movement'ofthe drill may beeffected," 1 l 'As aineans for retracting or advancing the 1 drill, by ascrew feed, the shaft 113*is fitted "with" a worm wheel 11 8 with wh ich we-rm in the scope 119 may be engaged; the worm beingmounted on a shaft 120, the inner end of which is supported on ahorizontally pivoted bearing 121, the outer end portion of which is journaled in'a bearing 122 adapted to be shifted vertically whereby the worm 119 crnay be thrown into and out of engagement with the worm wheelj118. The outer end ofthe shaft 113 is fitted with a hand wheel 123 by means of which theshaft and wormmay be manually rotated; The bearings 121 and 122 are carriedby the carriage member 73; the hearing 121being pivoted in a depending wall 124 formed on. the top wall 75 of the latter, and

the bearing 122 being carried in a vertically elongated slot 125 formed in the front wall 74. 'A spring 126 mounted inarecess 127 in the wall 7 4' exerts an upward pressure on the bearing 122 to normally position the shaft at ansincline with theiworni 119 out'of' mesh 1r with the worm wheel118, the worm 119 being maintained outof mesh when-theshaft 113; is to'be rotated through the disk 11,4. I

1 Depending from theshaft120 in front of the plate .74 is an time 128 having ashoulder 129 adapted to be engaged with a pin 130 on the plate 74 when it' is desired-to hold the shaft-120 inposition to mesh the worm 119 .withthe worm wheel 118. -Whenthe work is thus meshed: with the worm. wheel, the drill 116 may be advanced or retracted relative to the'work by a screw. feed. .Bymounting the worm 'shaft1'120 .on-the: cover member 7 3, it

may be readily placedein operative relation to the wormwwheel in assembling the-machine;

'As ameans'for counterbalancing the rack 'barsand the drills carried thereby, the cross head 103 is connected to arable 181 wound on a. spring reel 132 which acts to exert a yield- ,able upward pull on theicross headi- The carriage member 20 is normallyfree to slide 'onthe guide 451 and is fittedWith a handle 133 oy-which it may be manually grasped and advanced or retracted on the guide 45% q The operation of theinvention is apparent from the foregoing, it being seen that'by turning on the column (not shown) the drill maybe moved to various positions on an arc concentric with the axis' ofnthe column, and

by shifting the carriage/on the guide, the drill maybe disposed at various positions radially on the axis of the column.

. And byoperating either the (118k 114 or hand wheel 123, as before described, the drill may be fed to the work or retracted therefrom either by lever orscrew action.

. -While I have shown and describedthe specific embodiment of my invention, :1 do not limit myself to the exact'details of construction and arrangementshown, but may employ suchmodifications and changes as come withp of the appended claim. Iclaim:

1 Ina drill press feed, a carriage, a'pair 'of ien rack bars slidable vertically on said carriage, V

a drill-supporting shaft carried by said rack bars, a housing on said carriage having side walls, a shaft journalled in said side walls and extending therebetween, gear connections between said shaft and said rack bars, a worm wheel fixed on said shaft between said side walls, a top plate,a depending face plate on said top plate formed with a slot, said top and face plates being demountablycarried on said side walls, a pivoted bearing carried by said top plate, a shaft journalled in said bearing projecting through the slot in said face plate, a worm carried on said, last named shaft adapted to mesh with said worm wheel, a spring carried on said face plate acting on said worm carrying shaft to normally maintain the worm out of engagement with said worm'wheel, an arm on said worm carrying shaft, means on said face plate engageable with said arm tohold said worm in engagement with said worm wheel in opposition to said'spring, and hand operated means for rotating said worm carrying shaft. In testimony whereof, I have aflixed my signature' WILLIAM WELTON EDWARDS, V 

